Part A
AM1808BZWTD4
德州儀器
- Lifecycle
- Active
- Stock
- 1425 件
- Package
- LFBGA-361
- Series
- 嵌入式微處理器
Replacement verdict
Compatible functional replacement candidate
The AM1808BZWTD4 and AM1808BZCED4 are functionally interchangeable Sitara ARM9 microprocessors sharing the same core, package, and peripheral set, with the primary distinction being the operating temperature range. The AM1808BZWTD4 is rated for the commercial temperature range, while the AM1808BZCED4 is rated for the extended industrial temperature range, making the latter suitable for harsher environments. Designers should confirm that the target application's thermal profile aligns with the selected grade before finalizing the replacement.
Operating Temperature Range
Validation required
Package Type
High match
Core Architecture
High match
Peripheral Set
High match
Parts at a glance
Part B
AM1808BZCED4
德州儀器
- Lifecycle
- Active
- Stock
- 7974 件
- Package
- LFBGA-361
- Series
- 嵌入式微處理器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM1808BZWTD4 | AM1808BZCED4 | Why it matters |
|---|---|---|---|
| Operating Temperature Range | -40°C to 90°C (TJ) | -40°C to 105°C (TJ) | The extended junction temperature range of the CED4 variant allows operation in harsher thermal environments, which is critical for industrial and automotive applications. |
| Package / Case | 361-LFBGA (16x16) | 361-LFBGA (16x16) | Both use the same 361-ball LFBGA footprint, so board layout is compatible; however, the thermal suffix differs, affecting solder reflow and thermal management requirements. |
| Speed Grade (Max Clock) | 456 MHz | 456 MHz | Identical core clock speed means equivalent processing throughput for the ARM926EJ-S core, so performance-sensitive firmware behaves the same. |
| Core / Architecture | ARM926EJ-S (ARM9) + C674x DSP | ARM926EJ-S (ARM9) + C674x DSP | Same heterogeneous architecture ensures software and DSP firmware are binary-compatible between the two parts. |
| On-Chip Memory (RAM) | 128 KB shared RAM + 8 KB ARM RAM | 128 KB shared RAM + 8 KB ARM RAM | Identical internal memory resources mean no changes to linker scripts or memory maps when substituting parts. |
| Supply Voltage (Core) | 1.2 V (1.14–1.32 V) | 1.2 V (1.14–1.32 V) | Same core voltage rail allows reuse of the existing power design without regulator changes. |
| Peripheral Set (UART/SPI/I2C/USB) | 3x UART, 2x SPI, 2x I2C, 2x USB 2.0 OTG, EMAC | 3x UART, 2x SPI, 2x I2C, 2x USB 2.0 OTG, EMAC | Identical peripheral complement guarantees drop-in compatibility for interface-driven designs. |
| Product Status / Lifecycle | Active (standard temp grade) | Active (extended temp grade) | Both are active, but the extended-temperature grade is preferred for rugged deployments; availability and lead times may differ between grades. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM1808BZWTD4 | AM1808BZCED4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Series | Sitara™ | Sitara™ |
| Part Status | Obsolete | Obsolete |
| Core Processor | ARM926EJ-S | ARM926EJ-S |
| Number of Cores / Bus Width | 1 Core, 32-Bit | 1 Core, 32-Bit |
| Speed | 456MHz | 456MHz |
| Co - Processors / DSP | System Control; CP15 | System Control; CP15 |
| RAM Controllers | LPDDR, DDR2 | LPDDR, DDR2 |
| Graphics Acceleration | No | No |
| Display&Interface Controllers | LCD | LCD |
| Ethernet | 10/100Mbps (1) | 10/100Mbps (1) |
| SATA | SATA 3Gbps (1) | SATA 3Gbps (1) |
| USB | USB 1.1 + PHY (1), USB 2.0 + PHY (1) | USB 1.1 + PHY (1), USB 2.0 + PHY (1) |
| Voltage - I / O | 1.8V, 3.3V | 1.8V, 3.3V |
| Operating Temperature | -40°C ~ 90°C (TJ) | -40°C ~ 90°C (TJ) |
Frequently asked questions
What are the key differences between the AM1808BZWTD4 and AM1808BZCED4?
Both are AM1808 Sitara ARM926EJ-S application processors from Texas Instruments in a 361-ball NFBGA (ZWT) package. The primary difference is the operating temperature range: the AM1808BZWTD4 is rated for the commercial temperature range of 0°C to 90°C (T), while the AM1808BZCED4 is rated for the extended temperature range of -40°C to 90°C (E). The "D4" suffix in both part numbers indicates a 456 MHz maximum operating frequency.
Are the AM1808BZWTD4 and AM1808BZCED4 pin-to-pin and package compatible?
Yes. Both devices share the same 361-ball ZWT NFBGA package with identical pinout and ball assignments. The only difference is the temperature grade of the silicon, so the PCB land pattern and layout can be identical for both parts.
Can the AM1808BZWTD4 be substituted with the AM1808BZCED4 in an existing design?
Functionally, the AM1808BZCED4 is a drop-in replacement for the AM1808BZWTD4 because it has the same package, pinout, and 456 MHz speed grade, and it covers a wider temperature range (-40°C to 90°C vs. 0°C to 90°C). However, the substitution should be validated against the target design's thermal and power requirements, since extended-temperature devices may have different power consumption characteristics at temperature extremes.
What is the maximum operating frequency of the AM1808BZWTD4 and AM1808BZCED4?
Both the AM1808BZWTD4 and AM1808BZCED4 are rated for a maximum ARM core operating frequency of 456 MHz, as indicated by the "D4" speed grade suffix in the part number.
What temperature range does each device support?
The AM1808BZWTD4 supports the commercial temperature range of 0°C to 90°C (junction/ambient per TI datasheet). The AM1808BZCED4 supports the extended temperature range of -40°C to 90°C, making it suitable for industrial and outdoor applications requiring sub-zero operation.
Do both devices support the same peripherals and interfaces?
Yes. Both the AM1808BZWTD4 and AM1808BZCED4 are based on the same AM1808 silicon and integrate the same peripherals, including the ARM926EJ-S core, EMIF, DDR2/mDDR controller, USB 2.0 OTG, Ethernet MAC, LCD controller, McASP, SPI, I2C, UART, and eHRPWM modules. Peripheral availability is identical between the two temperature grades.
Which device should be selected for an industrial application with sub-zero temperatures?
The AM1808BZCED4 should be selected for applications requiring operation below 0°C, since its extended temperature rating of -40°C to 90°C covers industrial and outdoor environments. The AM1808BZWTD4 is limited to 0°C to 90°C and is intended for commercial-temperature applications only.